I have heared that if we use 4gb ram with amd a8 7600 we will get only 512mb of dedicated graphics memory by default of the whole 2gb of integrated graphics of the apu so with that can we set the dedicated graphics memory to 2gb using 4gb ram. Even if the dedicated graphics memory remains 512mb can i play games like gta 5, Batman arkham knight, witcher 3 with it on low settings. I'm on tight budget but will buy a graphics card soon but want to play some of the games for now